Moto Z Droid and Moto Z Force Droid both receive software update
Before you download and install the update, make sure that you are connected to a Wi-Fi network or have a strong cellular connection to Verizon Wireless. You also need to check your battery to make sure it is fully charged before starting the updating process.
Since this update is being sent out OTA, the files are sent out on a staggered basis. That means that it might not hit your phone for a few days. If you're the impatient type, you can try to coax it out by going to Settings > System updates > Check for System updates.